# [OSGeo Africa] Noob Question

Hanlie Pretorius hanlie.pretorius at gmail.com
Tue Feb 17 03:07:41 PST 2015

```Hi Jaco,

Slope is measured as vertical distance over horizontal distance. If
it's expressed in percent, the ratio is multiplied by 100.

Having said that, I agree that your values look incorrect.

of its values would be useful.

Can you perhaps also explain in detail how you created the slope map?

Cheers
Hanlie

> Date: Tue, 17 Feb 2015 10:04:27 +0000
> From: Jaco Engelbrecht <Jaco at bolandkelder.co.za>
> To: "africa at lists.osgeo.org" <africa at lists.osgeo.org>
> Subject: [OSGeo Africa] Noob Question
>
> Hi guys
>
> Noob question:
>
> I am using a srtm data set.
>
> When calculating slope, I figured to set it to percentage. Soo, what does
> this value mean? How do you interpret it in the legend? See pic attached.
>
> Best Regards,
>
>
>
> JACO ENGELBRECHT
> Viticulturist
>
> C: +27 82 801 3299
> E:  jaco at bolandkelder.co.za<mailto:jaco at bolandkelder.co.za>
> T:  +27 21 862 6190
> F:  +27 86 521 6147
> W: www.bolandcellar.co.za<http://www.bolandcellar.co.za/>
>
>     [Description: cid:906BA6EF-AB61-424E-9D18-8ABF3958DE33]
>
>
>
>
>
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